/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsEditorOnlyExp/Public/EditMeshMaterialsTool.h
class FEditMeshMaterials_MaterialSetChange : public [FToolCommandChange](API\Runtime\InteractiveToolsFramework\FToolCommandChange)
TArray<UMateri...
MaterialsAfter
TArray<UMateri...
MaterialsBefore